Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
Please read
the new rule regarding the restriction on the use of AI tools
.
×
→ Pay attention
Before contest
Codeforces Round (Div. 2)
4 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
1856D
More Wrong
divide and conquer
,
interactive
2100
x3250
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x12312
1856B
Good Arrays
implementation
,
math
900
x24259
1856A
Tales of a Sort
implementation
800
x26488
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x26645
1855A
Dalton the Teacher
greedy
,
math
800
x27935
1854F
Mark and Spaceship
brute force
,
dp
3500
x120
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x431
1854D
Michael and Hotel
binary search
,
interactive
,
trees
3000
x543
1854C
Expected Destruction
combinatorics
,
dp
,
math
,
probabilities
2500
x1489
1854B
Earn or Unlock
bitmasks
,
brute force
,
dp
2200
x3522
1854A2
Dual (Hard Version)
constructive algorithms
,
math
1900
x6987
1854A1
Dual (Easy Version)
constructive algorithms
,
math
1400
x14090
1853B
Fibonaccharsis
binary search
,
brute force
,
math
1200
x17396
1853A
Desorting
brute force
,
greedy
,
math
800
x31804
1852F
Panda Meetups
data structures
,
dp
,
flows
3500
x106
1852E
Rivalries
constructive algorithms
,
data structures
,
greedy
3400
x166
1852D
Miriany and Matchstick
constructive algorithms
,
dp
,
greedy
2800
x459
1852C
Ina of the Mountain
data structures
,
dp
,
greedy
,
math
2400
x1557
1852B
Imbalanced Arrays
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
1800
x4461
1852A
Ntarsis' Set
binary search
,
math
,
number theory
1800
x8036
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x3219
1851F
Lisa and the Martians
bitmasks
,
greedy
,
math
,
strings
,
trees
1800
x5823
1851E
Nastya and Potions
dfs and similar
,
dp
,
graphs
,
sortings
1500
x10305
1851D
Prefix Permutation Sums
implementation
,
math
1300
x15184
1851C
Tiles Comeback
greedy
1000
x23345
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x29243
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x29489
1850H
The Third Letter
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
1700
x8181
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x12364
1850F
We Were Both Children
brute force
,
implementation
,
math
,
number theory
1300
x19078
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x23128
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x36752
1850C
Word on the Paper
implementation
,
strings
800
x44121
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x42756
1850A
To My Critics
implementation
,
sortings
800
x55861
1849F
XOR Partition
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
greedy
,
trees
2700
x717
1849E
Max to the Right of Min
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
two pointers
2300
x1644
1849D
Array Painting
constructive algorithms
,
greedy
,
two pointers
1700
x8460
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x10503
1849B
Monsters
greedy
,
math
,
sortings
1000
x25695
1849A
Morning Sandwich
implementation
,
math
800
x27881
1848F
Vika and Wiki
binary search
,
bitmasks
,
combinatorics
,
divide and conquer
,
dp
,
math
2400
x1550
1848E
Vika and Stone Skipping
brute force
,
implementation
,
math
,
number theory
2600
x784
1848D
Vika and Bonuses
binary search
,
brute force
,
math
,
ternary search
2200
x2614
1848C
Vika and Price Tags
math
,
number theory
1800
x6290
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x14916
1848A
Vika and Her Friends
games
,
math
900
x16808
1847F
The Boss's Identity
binary search
,
bitmasks
,
data structures
,
dfs and similar
,
greedy
,
math
,
sortings
2500
x893
1847E
Triangle Platinum?
brute force
,
combinatorics
,
implementation
,
interactive
,
math
,
probabilities
2900
x329
1847D
Professor Higashikata
data structures
,
dsu
,
greedy
,
implementation
,
strings
1900
x3775
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12859
1847B
Hamon Odyssey
bitmasks
,
greedy
,
two pointers
1000
x19963
1847A
The Man who became a God
greedy
,
sortings
800
x21992
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x4380
1846F
Rudolph and Mimic
constructive algorithms
,
implementation
,
interactive
1800
x3107
1846E2
Rudolf and Snowflakes (hard version)
binary search
,
brute force
,
implementation
,
math
1800
x7021
1846E1
Rudolf and Snowflakes (simple version)
brute force
,
implementation
,
math
1300
x16867
1846D
Rudolph and Christmas Tree
constructive algorithms
,
geometry
,
math
1200
x19361
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x18885
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x26851
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x32463
1845F
Swimmers in the Pool
dp
,
fft
,
math
,
number theory
2800
x371
1845E
Boxes and Balls
dp
,
implementation
,
math
2500
x1319
1845D
Rating System
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
two pointers
1800
x7812
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x14226
1845B
Come Together
geometry
,
implementation
,
math
900
x21585
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x27452
1844H
Multiple of Three Cycles
combinatorics
,
data structures
,
dp
,
dsu
,
math
3400
x137
1844G
Tree Weights
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
implementation
,
math
,
matrices
,
number theory
,
trees
3000
x725
1844F2
Min Cost Permutation (Hard Version)
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
,
sortings
2800
x401
1844F1
Min Cost Permutation (Easy Version)
brute force
,
constructive algorithms
,
greedy
,
math
2600
x778
1844E
Great Grids
2-sat
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
2400
x1876
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x12272
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x15630
1844B
Permutations & Primes
constructive algorithms
,
math
1000
x18213
1844A
Subtraction Game
constructive algorithms
,
games
800
x24518
1843F2
Omsk Metro (hard version)
data structures
,
dfs and similar
,
divide and conquer
,
dp
,
math
,
trees
2300
x1599
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x5302
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x12304
1843D
Apple Tree
combinatorics
,
dfs and similar
,
dp
,
math
,
trees
1200
x18007
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x32993
1843B
Long Long
greedy
,
math
,
two pointers
800
x28948
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x34171
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x119
1842H
Tenzing and Random Real Numbers
bitmasks
,
dp
,
graphs
,
math
,
probabilities
3000
x666
1842G
Tenzing and Random Operations
combinatorics
,
dp
,
math
,
probabilities
2800
x1033
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1317
1842E
Tenzing and Triangle
data structures
,
dp
,
geometry
,
greedy
,
math
2300
x1614
1842D
Tenzing and His Animal Friends
constructive algorithms
,
graphs
,
greedy
1900
x4076
1842C
Tenzing and Balls
dp
1500
x12772
1842B
Tenzing and Books
bitmasks
,
greedy
,
math
1100
x17037
1842A
Tenzing and Tsondu
games
,
math
800
x19757
1841F
Monocarp and a Strategic Game
geometry
,
sortings
,
two pointers
2700
x489
1841E
Fill the Matrix
data structures
,
greedy
,
math
2200
x2013
1841D
Pairs of Segments
data structures
,
greedy
,
sortings
,
two pointers
2000
x4393
1841C
Ranom Numbers
brute force
,
dp
,
greedy
,
math
,
strings
1800
x7816
1841B
Keep it Beautiful
implementation
1000
x21457
1841A
Game with Board
constructive algorithms
,
games
800
x24672
1840G2
In Search of Truth (Hard Version)
constructive algorithms
,
interactive
,
math
,
meet-in-the-middle
,
probabilities
2500
x960
←
1
2
...
9
10
11
12
13
...
98
99
→
User lists
Name